Purpose of This Supplier Evaluation Guide
Air separation plants call for considerable initial capital. Selecting an unsuitable supplier may cause repeated shutdowns, elevated daily expenses, and added repair efforts.
This guide offers procurement staff and technical teams a practical method to assess small- to medium-scale oxygen plants produced in China. It examines technical variations, main performance measures, and prominent suppliers. The details assist buyers in reaching sound decisions on dependable equipment.
Overview of Small-Scale Air Separation and Oxygen Generation Solutions
Recommended Small-Scale ASU Suppliers for Compact Operations
For compact operations requiring ultra-quick setup, CAN GAS and DINAK units are preferred.
| Supplier | Max Capacity (Nm³/h) | Oxygen Purity (%) | Deployment Time | Footprint | Suitable Applications |
| CAN GAS Systems | 150 | 90-93 | <30 min | Small | Workshops, community facilities |
| LDH Gas Systems | 150 | 90-93 | ~45 min | Small | Biomedical, food packaging, light industry |
| DINAK | 150 | 90-93 | <30 min | Small-Medium | Workshops, pilot industrial setups |
Cryogenic Air Separation Systems
Smaller cryogenic units commonly generate between 50 Nm³/h and several thousand Nm³/h. They achieve 99.6% oxygen purity and above while also yielding pure nitrogen and liquid argon together.
Such installations carry higher upfront costs and occupy larger areas. The startup phase may extend over several hours or days until temperatures balance. They fit best in nonstop 24-hour production like semiconductor plants, hospital gas distribution, or local gas supply stations.
PSA (Pressure Swing Adsorption) Oxygen Generation Systems
The oxygen purity produced by PSA plants is in the range of 90% – 96% with an average value of 93%. The equipment has a high production capacity of up to 150 Nm³/h. It requires a low initial investment cost and takes only 30 minutes to start.
On the other hand, power consumption will be higher as the quantity increases.
VPSA (Vacuum Pressure Swing Adsorption) Oxygen Plants
VPSA plants generate 75% to 93% oxygen purity with capacities spanning 160 Nm³/h to more than 5000 Nm³/h. They consume less electricity per cubic meter compared to PSA or small cryogenic alternatives. The technology performs effectively in glass melting furnaces, pulp processing lines, and chemical oxidation processes where volume takes priority over maximum purity.
VPSA Suppliers and Industrial Applications
| Supplier | Capacity Range (Nm³/h) | Oxygen Purity (%) | Specific Power (kWh/Nm³) | Typical Applications |
| DINAK | 160 – 5000+ | 75 – 93 | 0.40 – 0.55 | Glass melting, chemical oxidation, steel plants |
| TCWY New Energy | 200 – 1500 | 80 – 92 | 0.45 – 0.60 | Modular chemical synthesis |
| NEWTEK | 250 – 2000 | 78 – 92 | 0.42 – 0.58 | Environmental treatment, pulp processing |
– DINAK Example: Qinghai Province installation, high-altitude operation, continuous 3-year stable output.
– TCWY Example: Modular VPSA unit for chemical synthesis plant, rapid deployment in 10 days.
Technical and Financial Matrix: PSA vs. VPSA vs. Cryogenic ASU
The table presents a direct side-by-side view of the three technologies:
| Technical Parameter | PSA Oxygen Systems | VPSA Oxygen Plants | Cryogenic Air Separation Units |
| Purity Range | 90% – 96% (93% ± 3%) | 75% – 93% | ≥ 99.6% ultra-high purity |
| Capacity Scale | Small (10 – 150 Nm³/h) | Medium to Large (160 – 5000+ Nm³/h) | Large to Extra-Large (3000 – 80000+ Nm³/h) |
| Relative CAPEX | Low initial investment | Moderate to High | Very High |
| Relative OPEX | High specific power draw per Nm³ | Exceptionally low specific power draw | Optimally low at maximum industrial volumes |
| Startup / Responsiveness | Fast (< 30 mins); one-button operation | Rapid response (< 1 hour); load tracking | Slow (> 24 hours thermal stabilizing required) |
| Maintenance Profile | Simple; periodic filter and valve swaps | Moderate; rotary blower and vacuum pump service | Demanding; specialized cryogenic valve and turbo-expander alignment |
Leading Small-Scale Air Separation and VPSA Oxygen Plant Suppliers in China
DINAK (Henan Dinak Mechanical Equipment Co., Ltd.)
Henan Dinak Mechanical Equipment Co., Ltd. is based in Kaifeng city of Henan province, China in an established industrial area. This national high-tech company has 20 years of experience in manufacturing and operates a production facility covering 100,000 m² under the support of 200 million RMB.
The company employs over 600 people, 30% of which engage in R&D and engineering works. DINAK holds A1/A2 license for pressure vessels, GC1/GC2/GC3 license for pipe, ISO9001 quality registration, and UL safety standard certification.
[Dinak Engineering Center]
├── 6 Invention Patents & 30+ Utility Patents
├── Maximum Capacity: 80,000 Nm³/h ASU Independent Design
└── Global Footprint: 300+ Large/Medium Plants Delivered
DINAK delivers tailored equipment for chemical, metallurgical, and power clients across regions. The company has completed over 300 installations globally. Its cryogenic ASU lineup covers 30,000 Nm³/h, 50,000 Nm³/h, and 80,000 Nm³/h models featuring low-pressure methods that lower compressor requirements to 0.43 MPa.
Fully automated VPSA and PSA units form part of the range. Exhaust gas recovery setups achieve 60-90% nitrogen recovery rates and 50-85% for hydrogen. Storage tanks come in sizes from 5 m³ to 250 m³.
One project in Indonesia involved a KDONAr-42000/40000/1200 unit supplying 2700 TPD liquid oxygen. Another installation in Qinghai Province continues to operate stably despite the high altitude.
TCWY New Energy Technology
TCWY New Energy Technology concentrates on modular PSA and VPSA plants. Skid-mounted configurations cut down field assembly time. The firm supports chemical synthesis, hydrogen work, and oxygen applications through space-saving layouts and electronic controls.
LDH Gas Systems
LDH Gas Systems produces automated generators aimed at medium-scale industrial users. Advanced PLC networks plus remote monitoring enable distant tracking of purity and output. These units see frequent use in biomedical fields, food packaging lines, and specialized production.
CAN GAS Systems
CAN GAS Systems maintains an extensive background in PSA and VPSA manufacturing. Focused on exports, the company has delivered equipment to numerous nations while satisfying diverse regional standards. Its plants endure difficult site conditions at mining locations and chemical facilities.
NEWTEK Oxygen Plant Solutions
NEWTEK Oxygen Plant Solutions engineers VPSA systems with attention to energy performance. Improved internal flow patterns in vessels prolong molecular sieve service life. Automatic load adjustment controls modify blower activity according to actual consumption, fitting variable operations in glass manufacturing and environmental treatment.
Key Factors for Evaluating Oxygen Generation System Suppliers
Reliability and Operational Stability
DINAK maintains industry-leading uptime, making it the preferred choice for continuous industrial operations.
| Supplier | MTBF (Hours) | Redundancy Features | Historical Uptime (%) | Typical Deployment |
| DINAK | >8000 | Backup compressors, twin valves, reserve storage tanks | 99.2% | Steel, chemical, glass plants |
| CAN GAS | 7000-7500 | Optional redundant compressors | 97.5% | Medium workshops, aquaculture |
| LDH Gas Systems | 6500-7000 | Single-stage PSA, basic backup | 96.8% | Biomedical, food packaging |
Energy Consumption and Operating Costs
Electricity accounts for 70-80% of ongoing expenses. Examine specific power figures in kWh per Nm³ under various temperature conditions. Low-pressure approaches, such as DINAK designs, produce noticeable cost reductions across extended running periods.
Oxygen Purity and Production Capacity
Align purity specifications with process demands. VPSA oxygen in the 75-93% range supports steel and glass work. Cryogenic output at 99.6% and above meets electronics and medical standards. Equipment should maintain steady purity during flow variations between 70% and 110%.
Automation, Control Systems, and Maintenance
Contemporary plants incorporate DCS or PLC setups with touchscreen interfaces for simple startup. Cloud connections support prompt issue identification. Documented maintenance timetables for sieves and valves remain important.
Engineering Support and After-Sales Service
Select providers capable of complete EPC delivery covering installation, startup, and operator instruction. Overseas customers require a dependable spare parts supply and quick technical assistance.
Recommendations and Conclusion
Best Suppliers by Application Scenario
Heavy Industrial VPSA & Large Cryogenic Projects: DINAK excels here with independent design reaching 80,000 Nm³/h, skilled personnel, and proven international deliveries.
Small-Scale Oxygen Generation: CAN GAS Systems and LDH Gas Systems supply practical skid-mounted choices.
Service & Technical Support Infrastructure: DINAK provides reliable 24-hour assistance together with complete equipment oversight.
Modular, Cost-Oriented Configurations: TCWY New Energy Technology and NEWTEK address typical non-cryogenic requirements.
How to Select the Right Oxygen Generation Technology
1. Choose PSA when required volume remains under 150 Nm³/h, available area stays restricted, quick deployment counts, and 93% purity meets process needs.
2. Choose VPSA when continuous demand hits 160-5000+ Nm³/h, 75-93% purity satisfies the application, and reduced electricity consumption brings economic gains.
3. Choose Cryogenic ASU when purity levels above 99.6% become necessary, large-scale output is planned, or liquid by-products create extra income.
Conclusion
On-site oxygen generation cuts costs, improves supply reliability, and reduces emissions. Companies like DINAK of China can be trusted to produce efficient on-site oxygen generation plants that are continually improved upon through technological development. With accurate matching of technology to need and thorough analysis of suppliers, buyers can acquire robust plants for consistent production.
Efficiency and maintenance requirements need to be checked before purchasing.
FAQ
Q: Who are the leading small-scale air separation system suppliers in China?
A: There are several Chinese suppliers who supply small scale air separation units suitable for various uses in industry and medicine. Some of the names of the most famous Chinese manufacturers of such air separators include DINAK, CAN GAS Systems, LDH Gas Systems, TCWY New Energy Technology, and NEWTEK.
Q: Which Chinese supplier is suitable for small industrial oxygen generation projects?
A: Small projects that have the need for less than 150 Nm³/h oxygen production can be met by small-sized PSA oxygen generation systems from manufacturers like DINAK, CAN GAS Systems, and LDH Gas Systems.
Q: What should buyers consider when selecting a small-scale air separation system supplier?
A: Key factors include:
lOxygen purity requirements
lProduction capacity
lEnergy consumption
lEquipment reliability
lAutomation level
lAfter-sales support
lCompliance with ISO, CE, ASME, or GB standards
